Convert Nanometers to Inches
1 nanometer (nm) equals 3.937007874 × 10⁻⁸ inches (in).
1 nm = 3.937007874e-8 in
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk nanometer to inch converter to paste a column from Excel.
How to Convert Nanometer to Inch
- 1 nm = 3.937007874 × 10⁻⁸ in
- 1 in = 25400000 nm
- Example: convert 15 nm to in: 15 nm = 15 × 3.937007874 × 10⁻⁸ in = 5.905511811 × 10⁻⁷ in
Reference conditions. in: The international yard and pound agreement (1959) fixed 1 yard = 0.9144 m exactly, so the inch, foot and mile are exact.
Formula
in = nm ÷ 25400000
Derivation from SI units:
- 1 nm = 10⁻⁹ m
- 1 in = 2.54 cm = 0.0254 m (exact)
- 1 nm = 1 × 10⁻⁹ m ÷ 0.0254 m per in = 3.937007874016 × 10⁻⁸ in
Both units are defined exactly, so the factor is exact. Nanometer definition: nanometer; Inch definition: inch.
Worked examples
- A reading of 20 nm converts to 7.874015748 × 10⁻⁷ in.
20 nm × 3.937007874 × 10⁻⁸ = 7.874015748 × 10⁻⁷ in - A value of 500 nm is 0.00001968503937 in.
500 nm × 3.937007874 × 10⁻⁸ = 0.00001968503937 in
Nanometer to Inch conversion table
| Nanometers (nm) | Inches (in) |
|---|---|
| 0.1 nm | 3.937007874 × 10⁻⁹ in |
| 1 nm | 3.937007874 × 10⁻⁸ in |
| 2 nm | 7.874015748 × 10⁻⁸ in |
| 5 nm | 1.968503937 × 10⁻⁷ in |
| 10 nm | 3.937007874 × 10⁻⁷ in |
| 20 nm | 7.874015748 × 10⁻⁷ in |
| 50 nm | 0.000001968503937 in |
| 100 nm | 0.000003937007874 in |
| 200 nm | 0.000007874015748 in |
| 380 nm | 0.00001496062992 in |
| 450 nm | 0.00001771653543 in |
| 500 nm | 0.00001968503937 in |
| 550 nm | 0.00002165354331 in |
| 650 nm | 0.00002559055118 in |
| 700 nm | 0.00002755905512 in |
| 780 nm | 0.00003070866142 in |
| 1000 nm | 0.00003937007874 in |
Where it's used
Nanometers are used for wavelengths of light (UV, visible, near-IR), while inches appear in screen and TV sizes (diagonal). Both measure length and distance, so the conversion is a fixed factor.
Nanometer to other length units
| Conversion | 1 nm equals |
|---|---|
| nanometer to meter | 1 × 10⁻⁹ m |
| nanometer to kilometer | 1 × 10⁻¹² km |
| nanometer to centimeter | 1 × 10⁻⁷ cm |
| nanometer to millimeter | 0.000001 mm |
| nanometer to micrometer | 0.001 µm |
| nanometer to angstrom | 10 Å |
| nanometer to mile | 6.213711922 × 10⁻¹³ mi |
| nanometer to yard | 1.093613298 × 10⁻⁹ yd |
| nanometer to foot | 3.280839895 × 10⁻⁹ ft |
| nanometer to inch | 3.937007874 × 10⁻⁸ in |
| nanometer to mil | 0.00003937007874 mil |
| nanometer to nautical mile | 5.399568035 × 10⁻¹³ nmi |
Frequently asked questions
How many inches are in 1 nanometer?
1 nm = 3.937007874 × 10⁻⁸ in.
How do I convert nanometers to inches?
Multiply the value in nm by 3.937007874 × 10⁻⁸, or divide it by 25400000. For example, 15 nm × 3.937007874 × 10⁻⁸ = 5.905511811 × 10⁻⁷ in.
Is the nm to in conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch (in)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Nanometers to Inches. Retrieved October 17, 2026, from https://scientificconverters.com/length/nanometers-to-inches/
IEEE
Scientific Converters, "Convert Nanometers to Inches," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/nanometers-to-inches/